Official temperature readings from National Weather Service stations in the Dallas area, including Dallas/Fort Worth International Airport, recorded a daily maximum of 96-97°F on September 17, 2026, aligning precisely with the market's dominant outcome. This measurement occurred amid an extended September heat wave featuring repeated triple-digit days, well above the 1991-2020 climatological average high of 89°F for the date, driven by persistent high pressure, southerly flow, and minimal cloud cover that limited cooling. Trader consensus at near-100% implied probability reflects high confidence in these verified observations, as prediction markets aggregate real-capital assessments of official data. Minor adjustments remain possible only if final quality-controlled records from primary stations revise the peak by a degree due to instrumentation checks or station-specific differences, though such changes are historically rare for this event.